ZIP Codes of Rosebud County, MT

Population & People
Population & People
Total Population
9,194
Household Income
Household Income
Median Income
$57,991
Housing
Housing
Total Housing Units
4,096
Business & Economy
Business & Economy
Total Businesses
176
Employment
Employment
Employment Rate
50.50%
Education
Education
Bachelor's Degree+
20.58%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 11 ZIPs in this county.
Data Last Updated: July 1, 2026
ZIP Codes:11 ZIP Codes (7 Standard, 3 PO Box, 1 Unique) [See All]
Area Code:406
Timezone:Mountain (GMT -07:00)
Local Time:11:54:13 PM
Population:9,194 [See All]
FIPS:30087
Land Area:5,463 sq mi
Water Area:17 sq mi
Coordinates:46.1007, -106.6132
Quick Link:
https://www.zip-codes.com/county/mt-rosebud.asp
Need Rosebud data in your app? Look up ZIP, county, and city data with a single API call.
Try Free
Extreme geographic sprawl
The largest ZIP spans 213× the smallest by area — 2,006.9 sq mi down to 9.41.

Standout ZIPs in this County


Most Populous
Lame Deer · 2,727 people
29.7% of county total
Highest Income
Colstrip · $82,500 median
1.4× county average
Largest Land Area
Forsyth · 2,006.9 sq mi
Spans the most ground
Fastest Growth
Ashland · 16.5% (10-yr)
1,145 → 1,334 residents
Most Educated
Colstrip · 25.9% bachelor's+
369 of 1,425 adults 25+

Things worth knowing about Rosebud County


9,194 residents live across 11 ZIPs covering 5,463 sq mi, served by 10 distinct USPS-recognized cities.

Population moved from 10,060 to 9,191 from 2014 to 2024 — a -8.6% change. 3 ZIPs gained residents, 6 lost.

The county's wealthiest ZIP 59323 (Colstrip, $82,500 median) and poorest ZIP 59043 (Lame Deer, $29,028) are 24.7 miles apart — a 2.8× income gap across local geography.

Median home values vary 3.4× across this county — from $67,800 in 59347 (Rosebud) to $233,900 in 59327 (Forsyth).

Density varies 106× across the county — from 0 people/sq mi in 59347 (Rosebud) to 40 in 59323 (Colstrip).

Educational attainment ranges from 9.4% bachelor's+ in 59043 (Lame Deer) to 25.9% in 59323 (Colstrip) — the breadth of educational profiles across the area.

Within Montana, this is the #25 most populous of 56 counties and ranks #45 for median household income .

Hosts 1 single-entity Unique ZIP: 59004Saint Labre Mission .

Weighted by population, the typical household earns about $51,600 across the county — reflecting what a typical resident sees, not a simple ZIP average.

20.6% of adults age 25+ hold a bachelor's degree or higher (1,180 of 5,735 reporting).

7 Standard delivery, 3 PO Box only, 1 single-entity Unique ZIPs serve this county.

Stories about Rosebud County


Big & sparse

A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.

Total area
5,463
square miles
Avg density
1.7
people per sq mi
Population
9,194
across 11 ZIPs
Forsyth
2,006.9 sq mi
2,610 residents
Rosebud
852.0 sq mi
323 residents
Ashland
796.0 sq mi
1,334 residents

Population decline

Rosebud County lost 8.6% of residents between 2014 and 2024. ZIPs that shed the largest share:

Forsyth
-13.4%
3,014 → 2,610 residents

All ZIP Codes in Rosebud County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
59043Lame DeerPO Box2,727$29,028388.8-8.0%
59327ForsythStandard2,610$52,6392,006.9-13.4%
59323ColstripPO Box2,101$82,50052.1-9.2%
59003AshlandStandard1,334$44,833796.016.5%
59347RosebudStandard323$57,250852.05.2%
59012BirneyStandard44$56,250128.9-81.6%
59312AngelaStandard29$83,438377.220.8%
59039IngomarStandard13629.0-63.9%
59333HathawayStandard109.4-37.5%
59083SumatraPO Box3223.3
59004AshlandUnique0.0

Adjacent & Nearby Counties